Product Sheet Soda Ash
A weak base that is soluble in water and dissociates into sodium (Na) and carbonate (CO3) ions in solution.
Soda ash is the common name for sodium carbonate (Na2CO3). It is a weak base that is soluble in water and dissociates into sodium (Na) and carbonate (CO3) ions in solution.
Calcium is present in many makeup waters and formations. It can cause flocculation of the mud, resulting in increased rheology, gel strengths, and fluid loss. High-filtrate calcium causes precipitation of calcium-sensitive additives, such as POLY-PLUS high-molecular-weight liquid clay inhibitors and RINGFREE polymeric thinners, which are the most sensitive. Cellulosic polymers are only slightly calcium-sensitive and tolerate moderate levels of filtrate calcium.
Typical treatments of soda ash range from 0.25 to 2 lbm/bbl [0.7 to 5.7 kg/m3], depending on the calcium level and water chemistry of the drilling fluid. One pound [0.45 kg] of soda ash removes the calcium from 1.283 lb [0.58 kg] calcium sulfate (anhydrite). Treatments should be made on an incremental basis to prevent over-treatment, which results in carbonate contamination.
In pure water, soda ash forms highly buffered solutions that have a pH range of 10.9–11.6 at concentrations of 0.21 to 30 lb/bbl [0.6 to 86 kg/m3]. Carbonate ions begin being converted into bicarbonate (HCO3) ions when the pH decreases below 11.3.
Bioassay information is available upon request. Handle as an industrial chemical, wearing protective equipment and observing the precautions described on the transportation and MSDS.
Soda ash is an alkaline material that can cause irritation to eyes, skin, or respiratory tract. Soda ash should be added slowly to the mud system either by mixing through the hopper or chemical barrel. Do not mix soda ash with other chemicals, especially caustic soda or lime. When using a chemical barrel, mix soda ash into a full barrel of freshwater and provide adequate agitation.
Soda ash is a globally available commercial chemical and is packaged in 100-lb [45.4-kg] and 50-lb [22.7-kg], multiwall, paper sacks. Store in a dry area away from water or acids.
|Typical Physical Properties|
|Typical Physical Properties Physical appearance||White powder|
|Typical Physical Properties Specific gravity||2.51|
|Typical Physical PropertiespH (1% solution)||11.4|
|Typical Physical Properties Solubility in water||572 degF [300 degC], 51 g/100 mL at 86 degF [30 degC]|